/*
* Simple Auto Expanding Text Area (0.1.2-dev)
* by Antti Kaihola (antti.kaihola.fi)
* akaihol+jquery@ambitone.com
*
* Copyright (c) 2009 Antti Kaihola (antti.kaihola.fi)
* Licensed under the MIT and BSD licenses.
*
* NOTE: This script requires jQuery to work. Download jQuery at
* www.jquery.com
*/

(function(jQuery) {

jQuery.fn.simpleautogrow = function() {
return this.each(function() { new jQuery.simpleautogrow(this); }); };

jQuery.simpleautogrow = function (e) {
var self = this;
var $e = this.textarea = jQuery(e)
.css({overflow: 'hidden', display: 'block'})
.bind('focus', function() {
this.timer = window.setInterval(function() {self.checkExpand(); }, 200); })
.bind('blur', function() { clearInterval(this.timer); });
this.border = $e.outerHeight() - $e.innerHeight();
this.clone = $e.clone().css({position: 'absolute', visibility: 'hidden'}).attr('name', '')
$e.height(e.scrollHeight + this.border)
.after(this.clone);
this.checkExpand(); };

jQuery.simpleautogrow.prototype.checkExpand = function() {
var target_height = this.clone[0].scrollHeight + this.border;
if (this.textarea.outerHeight() != target_height)
this.textarea.height(target_height + 'px');
this.clone.attr('value', this.textarea.attr('value')).height(0); };

})(jQuery);